A Hydraulic piling rig is a construction machinery for piling in foundation engineering. It is mainly applied to drill in sandy soil, clay, silty clay, etc and widely used cast-in-place piles, diagram wall, foundation reinforcement and other foundation projects. Its rated power of engine is around 108-450kW, output torque 60-400kN•m, maximum pile diameter 1.5-4m, maximum pile depth 60-90m. It can meet construction requirement of kinds of foundation engineering projects. It generally applies hydraulic crawler chassis, automatic lift box-type mast, telescopic drill pipe, auto vertical adjuster, depth indicator, etc. Its operation applies hydraulic pilot control, load sensor, thus it is easy and comfortable to control. Main and auxiliary hoisting can meet different requirements in constructio